After much research and planning I chose a trimlock seal for my stargazer window. Well, I need to go to plan B. After adding the aluminum to the plywood, it's too wide for the trimlok. I knew this was potentially a problem and I could sand the ply down. Really not a good solution, I returned the trimlok and now just want to mount the Polycarbonate down flat to the roof. I am sure someone has done this but I could not find anyone here.
Question is, what would be the best method of sealing? Poly chalk, butyl tape? Seems like there are countless chalks and methods. I have seen some sailors use just poly sealant for frameless windows but that seems like a mess. I am probably overthinking this one too.